基于IEEE 802.11的实时无线传感器和执行器网络空间分集的EDCA延迟分析

M. Maadani, S. Motamedi
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引用次数: 13

摘要

可靠性和数据包延迟是无线传感器与执行器网络(WSAN)中最具挑战性的两个参数。本文深入分析了在介质访问控制(MAC)中使用增强型分布式信道访问(EDCA)和物理层(PHY)中的简单空间分集(SD)方案的支持多输入多输出(MIMO)的IEEE 802.11技术的饱和延迟特性。结果表明,由于WSAN环境下的信噪比较低,频谱效率较低的简单调制方案具有较好的延迟和可靠性性能。否则,延迟将对信噪比、数据包负载、竞争节点数等参数高度敏感。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
EDCA delay analysis of spatial diversity in IEEE 802.11-based real-time wireless sensor and actuator networks
Reliability and packet delay, are the two most challenging parameters of wireless sensor and actuator networks (WSAN). In this paper, saturation delay characteristics of Multiple Input Multiple Output (MIMO)-enabled IEEE 802.11 technology utilizing Enhanced Distributed Channel Access (EDCA) at Medium Access Control (MAC) and a simple Spatial-Diversity (SD) scheme in PHYsical (PHY) layer has been thoroughly analysed. Results show that due to the low Signal to Noise Ratio (SNR) in WSAN environment, simple modulation schemes with lower spectral efficiency have better delay and reliability performance. Otherwise, the delay will be highly sensitive to SNR, packet payload, number of competing nodes and other parameters.
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